Reigning as the largest land predators, polar bears are the true kings of the Arctic. With body lengths reaching up to 3 ...

In a baffling show of generosity, killer whales across the globe are giving fish to humans—and scientists are racing to ...

A beluga whale at Chicago's Shedd Aquarium is the first to successfully recover from general anesthesia in captivity after a surgery to remove a network of cysts.

Surgery is always risky, and when you’re operating on an animal rather than a person, the logistics involved can be pretty ...